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A sol–gel polydimethyldiphenylsiloxane (PDMDPS) coating was developed for capillary microextraction on-line hyphenated with high-performance liquid chromatography (HPLC). This coating was created using methyltrimethoxysilane (MTMS) as the sol–gel precursor and di-hydroxy-terminated PDMDPS as the sol–gel active polymer. The methyl and phenyl groups on the sol–gel active polymer and the methyl groups...
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